Nongeniculate coralline algae from IODP Site 310-M0005D

DOI

Material cored during the Integrated Ocean Drilling Program (IODP) Expedition 310 'Tahiti Sea Level' revealed that the fossil reef systems around Tahiti are composed of two major stratigraphic sequences: (i) a last deglacial sequence; and (ii) an older Pleistocene sequence. The older Pleistocene carbonate sequence is composed of reef deposits associated with volcaniclastic sediments and was preserved in Hole 310-M0005D drilled off Maraa. Within an approximately 70-m-thick older Pleistocene sequence (33.22-101.93 m below seafloor; 92.85-161.56 m below present sealevel) in this hole, 11 depositional units are defined by lithological changes, sedimentological features, and paleontological characteristics and are numbered sequentially from the top of the hole downward (Subunits P1-P11). Paleowater depths inferred from nongeniculate coralline algae, combined with those determined by using corals and larger foraminifers, suggest two major sealevel rises during the deposition of the older Pleistocene sequence. Of these, the second sealevel rise is associated with an intervening sealevel drop. It is likely that the second sealevel rise corresponds to that during Termination II (TII, the penultimate deglaciation, from Marine Isotope Stages 6 to 5e). Therefore, the intervening sealevel drop can be correlated with that known as the 'sealevel reversal' during TII. Because there are limited data on the Pleistocene reef systems in the tropical South Pacific Ocean, this study provides important information about Pleistocene sealevel history, the evolution of coral reef ecosystems, and the responses of coral reefs to Quaternary climate changes.

Sediment depth is given in mbsf.+ = present;- = present (fragment)

Identifier
DOI https://doi.org/10.1594/PANGAEA.788464
Related Identifier https://doi.org/10.1111/j.1440-1738.2010.00737.x
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.788464
Provenance
Creator Iryu, Yasufumi ORCID logo; Takahashi, Yasunari; Fujita, Kazuhiko; Camoin, Gilbert ORCID logo; Cabioch, Guy; Matsuda, Hiroki; Sato, Tokiyuki; Sugihara, Kaoru; Webster, Jody M ORCID logo; Westphal, Hildegard ORCID logo
Publisher PANGAEA
Publication Year 2012
Rights Creative Commons Attribution 3.0 Unported; https://creativecommons.org/licenses/by/3.0/
OpenAccess true
Representation
Language English
Resource Type Dataset
Format text/tab-separated-values
Size 494 data points
Discipline Earth System Research
Spatial Coverage (-149.551 LON, -17.767 LAT); Tahiti, offshore Maraa
Temporal Coverage Begin 2005-10-10T22:55:00Z
Temporal Coverage End 2005-10-12T03:33:00Z